Display screen or portion thereof with lock and alert unlocked graphical user interface



The sole FIGURE is a front view of a display screen or portion thereof with lock and alert unlocked graphical user interface showing the new design.

The peripheral broken line depicted in the FIGURE showing the display screen or portion thereof is included for the purpose of illustrating environmental structure and forms no part of the claimed design. 

CLAIM The ornamental design for a display screen or portion thereof with lock and alert unlocked graphical user interface, as shown and described. 